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Range Vent Hood Lights Not Working

The part(s) or condition(s) listed below for the symptom Range vent hood lights not working are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Range vent hood lights not working

For the most accurate results, enter your model number.


Cause 1Light Assembly

If the vent hood light is burned out, replace it. Some manufacturers do not sell the light bulb as an individual part; instead, they require you to purchase the light assembly.

Parts
Cause 2Light Bulb

Try replacing the light bulb before replacing any of the other parts associated with the light bulb.

Parts
Cause 3Halogen Lamp

One or more of the halogen lamp bulbs may be burned out. Since it’s very difficult to visually determine if any of the halogen lamps have burned out, use a multimeter to test them for continuity. Alternatively, you can just try replacing the bulbs.

Parts
Cause 4Light Socket

To determine if the light socket is defective, use a multimeter to test the incoming power to the socket. If the light socket has power, but the light bulb isn’t working, replace the light socket.

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Cause 5Light Switch

To determine if the light switch is defective, use a multimeter to test the switch for continuity. If the light switch does not have continuity, replace it.

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Cause 6Push Button Switch

To determine if the push button switch is defective, use a multimeter to test the switch for continuity. If the push button switch does not have continuity, replace it

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Cause 7Fan or Light Switch

To determine if the fan or light switch is defective, use a multimeter to test the switch for continuity. If the fan or light switch does not have continuity, replace it.

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Cause 8Switch Kit

To determine if the switch kit is defective, use a multimeter to test the switch for continuity. If the switch does not have continuity, replace it.

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Cause 9Rocker Switch

To determine if the rocker switch is defective, use a multimeter to test the switch for continuity. If the rocker switch does not have continuity, replace it.

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Cause 10Rotary Switch

To determine if the rotary switch is defective, use a multimeter to test the switch for continuity. If the rotary switch does not have continuity, replace it.

Parts
Cause 11Main Control Board

The main control board might be defective. Before replacing the main control board, first replace the light bulb. If the lights still aren’t working, check the bulb sockets as well as the switches associated with the bulb. If the light bulb, socket, and switches are not defective, replace the main control board. Control boards are often misdiagnosed—before replacing the main control board, make sure you check more commonly defective parts.

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Cause 12Selector Switch

To determine if the selector switch is defective, consult your vent hood’s wiring diagram and use a multimeter to test the switch for continuity. If the selector switch does not have continuity, replace it.

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Cause 13Switch

To determine if the switch is defective, use a multimeter to test the switch for continuity. If the switch does not have continuity, replace it.

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Cause 14Touchpad

If just one or two of the touchpad buttons aren't working properly then it's likely the touchpad itself is defective and should be replaced.

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Cause 15Transformer

Range vent hood lights are often powered by a lower voltage than the incoming voltage to the unit. If the lights are not working check to see if there is proper supply voltage to the transformer with a multimeter. You can use the wiring diagram on the unit or in the owner's manual for reference. If the transformer is receiving proper supply voltage but no secondary voltage is present at the lights, the transformer is defective and will need to be replaced.

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Cause 16Touchpad and Control Panel

If just one or two of the touchpad buttons aren't working properly then it's likely the touchpad and control panel itself is defective and should be replaced.

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Cause 17Control Board

The control board might be defective. Before replacing the control board, first replace the light bulb. If the lights still aren’t working, check the bulb sockets as well as the switches associated with the bulb. If the light bulb, socket, and switches are not defective, replace the control board. Control boards are often misdiagnosed—before replacing the board, make sure you check more commonly defective parts.

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Cause 18Control Module

The control module might be defective. Before replacing the module, first replace the light bulb. If the lights still aren’t working, check the bulb sockets as well as the switches associated with the bulb. If the light bulb, socket, and switches are not defective, replace the control module. Modules are often misdiagnosed—before replacing the component, make sure you check more commonly defective parts.

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